Imperial College London
Alternate

Saskia Goes

Faculty of Engineering, Department of Earth Science & Engineering

Professor of Geophysics
 
 
 
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Contact

 

+44 (0)20 7594 6434s.goes

 
 
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Location

 

4.47Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Altoe:2020:10.1016/j.epsl.2020.116465,
author = {Altoe, I and Eeken, T and Goes, S and Foster, A and Darbyshire, F},
doi = {10.1016/j.epsl.2020.116465},
journal = {Earth and Planetary Science Letters},
title = {Thermo-compositional structure of the north-eastern Canadian Shield from Rayleigh wave dispersion analysis as a record of its tectonic history},
url = {http://dx.doi.org/10.1016/j.epsl.2020.116465},
volume = {547},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The thermal and compositional structure of lithospheric keels underlying cratons, which are stable continental cores formed during the Precambrian, is still an enigma. Mapping lithospheric temperatures and compositional heterogeneities is essential to better understand geodynamic processes that control craton formation and evolution. Here we investigate the northeastern part of North America which comprises the Superior Craton, the largest Archean craton in the world, and surrounding Proterozoic belts. We model Rayleigh-wave dispersion curves from a previous study, which were regionalised based on cluster analysis. Next, we perform a grid search for sub-crustal thermal and compositional structures that are consistent with the average dispersion curve for each cluster. We apply constraints on crustal structure and use thermodynamic methods to map thermo-compositional structures into seismic velocity. In agreement with previous studies, most regions require concentrations of metasomatic minerals over certain depth intervals to fit the seismic profiles. Our results further require vertical as well as lateral variations in compositional and thermal structures, which appear to reflect different stages of formation and modification of the lithosphere below the region, with distinct structures found under Archean cores, Archean/Paleoproterozoic collision belts, mid-late Proterozoic collision belts, and zones affected by rifting.
AU  - Altoe,I
AU  - Eeken,T
AU  - Goes,S
AU  - Foster,A
AU  - Darbyshire,F
DO  - 10.1016/j.epsl.2020.116465
PY  - 2020///
SN  - 0012-821X
TI  - Thermo-compositional structure of the north-eastern Canadian Shield from Rayleigh wave dispersion analysis as a record of its tectonic history
T2  - Earth and Planetary Science Letters
UR  - http://dx.doi.org/10.1016/j.epsl.2020.116465
UR  - http://hdl.handle.net/10044/1/81337
VL  - 547
ER  -
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